You can forward individual phones to individual mailboxes. Note that *any* line that rings at a phone will be forwarded, if a line rings on two phones and they are both forwarded, you will have major problems.
Individual phone forwarding:
lift handset, dial 72, dial forward type (0-3), dial voicemail pilot number, hangup.
(To cancel CFWD, dial 72)
Set "Call forward follow digits"
- Lift handset, dial PROG, AUTO, *
-dial extension number, dial ALL DIGITS needed by voicemail system ro route call to specific mailbox, press hold.